Correct option is A
The correct option to express the sentence in future tense form is (a) We will be holding the things with a strong rope.
• The original sentence, "We were holding the things with a strong rope," is in past continuous tense.
• To convert it into future continuous tense, the appropriate form would be "will be holding."
Tense forms of all options:
• "We will be holding the things with a strong rope." (Future Continuous Tense)
• "We have been holding the things with a strong rope." (Present Perfect Continuous Tense)
• "We were being holding the things with a strong rope." (Incorrect grammatical structure)
• "We are holding the things with a strong rope." (Present Continuous Tense)